All Questions ⁺⁰237665 Questions

-1

729

1

+1246

Help!

Let $f(x) = 3x-8$ and $g(f(x)) = 2x^2 + 5x - 3.$ Find $g(-5).$

Lightning Jul 15, 2018

Jul 14, 2018

0

956

1

Counting And Proabability

Human beings have discovered an inhabitable planet and soon after, they find 10 more inhabitable planets. Of these 11, only 5 are deemed ``Earth-like'' in its resources and the rest are deemed ``Mars-like'' since they lack many important resources. Assume read more ..

Guest Jul 14, 2018

0

747

1

trig

csc(arctan( \sqrt(9-u^(2)))/(u))

Guest Jul 14, 2018

-1

3465

3

+1246

Help!

Let $x\mathbin{\spadesuit}y = x^2/y$ for all $x$ and $y$ such that $y\neq 0$. Find all values of $a$ such that $a\mathbin{\spadesuit} 3 = 9$. List the values you find in increasing order, separated by commas.

Lightning Jul 14, 2018

0

879

1

+1246

Help!

Suppose that $g(x)=f^{-1}(x)$. If $g(-15)=0$, $g(0)=3$, $g(3)=9$ and $g(9)=20$, what is $f(f(9))$?

Lightning Jul 14, 2018

0

1739

1

+1246

Help!

Let $f(x) = 3x-8$ and $g(f(x)) = 2x^2 + 5x - 3.$ Find $g(-5).$

Lightning Jul 14, 2018

0

988

0

+145

Help me plz.

k,a_2,a_3 and k,b_2,b_3 are both nonconstant geometric sequences with different common ratios. We have
.
Find the sum of the common ratios of the two sequences.

DanielCai Jul 14, 2018

0

860

1

What are all real solutions to $ 2(2^x- 1) x^2 + (2^{x^2}-2)x = 2^{x+1} -2$ ?

Please provide explanation.

Guest Jul 14, 2018

-1

1877

5

John is 3/4 the age of James. Three years ago, John was 5/7 the age of James. How old is James?

John is 3/4 the age of James. Three years ago, John was 5/7 the age of James. How old is James?

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Guest Jul 14, 2018

0

1277

1

+145

Consider two infinite geometric series. The first has leading term $a,$ common ratio $b,$ and sum $S.$ The second has a leading term $b,$ co

Consider two infinite geometric series. The first has leading term a common ratio b and sum s. The second has a leading term b common ratio a and sum 1/s. Find the value of a/b.

DanielCai Jul 14, 2018

0

925

3

+145

Help please

An infinite geometric series has common ratio -1/3 and sum 25 What is the second term of the sequence?

DanielCai Jul 14, 2018

+1

2704

2

+193

PLZ HELP

In right triangle ABC with angle B = 90˚ , we have 2sinA = 3cosA . What is sinA?

Confusedperson Jul 14, 2018

0

1563

1

+25

Plz help!!

Degrees are not the only units we use to measure angles. We also use radians. Just as there are $360^\circ$ in a circle, there are $2\pi$ radians in a circle. Compute $\tan \frac{\pi}{3}$.

CluelesssPersonnn Jul 14, 2018

0

1024

6

John is the age of James. Three years ago, John was the age of James. How old is James?

John is the age of James. Three years ago, John was the age of James. How old is James?

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Guest Jul 14, 2018

Jul 13, 2018

0

1201

15

rolling dice.

10 fair six-sided dice are rolled. What is the probability of obtaining exactly one pair each of the odd numbers, that is 11, 33, and 55? Thanks.

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Guest Jul 13, 2018

0

1161

1

Pythagorean triples.

Given any two whole integers m and n such that m > n, how do you generate a Pythagorean triple. Example: 7 and 5? Thank you.

Guest Jul 13, 2018

0

1847

3

How many...

How many positive integers are there whose digits strictly increase from left to right?
(For example, 28, 13589, and 4 are all such integers. "Strictly" means no two digits can be equal, so 15668 wouldn't count.)

Guest Jul 13, 2018

0

1917

1

+541

Help ASAP

How many non-congruent right triangles are there, all of whose sides have positive integer lengths, and one of whose legs (i.e. not the hypotenuse) has length 162?

xXxTenTacion Jul 13, 2018

+2

1207

1

+541

Help Me Plz

Richard is building a rectangular backyard from 360 feet of fencing. The fencing must cover three sides of the backyard (the fourth side is bordered by Richard's house). What is the maximum area of this backyard?

xXxTenTacion Jul 13, 2018

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